/*===========================================================================*\
*                                                                           *
*                               OpenMesh                                    *
*      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen      *
*                           www.openmesh.org                                *
*                                                                           *
*---------------------------------------------------------------------------* 
*                                                                           *
*                                License                                    *
*                                                                           *
*  This library is free software; you can redistribute it and/or modify it  *
*  under the terms of the GNU Library General Public License as published   *
*  by the Free Software Foundation, version 2.                              *
*                                                                           *
*  This library is distributed in the hope that it will be useful, but      *
*  WITHOUT ANY WARRANTY; without even the implied warranty of               *
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
*  Library General Public License for more details.                         *
*                                                                           *
*  You should have received a copy of the GNU Library General Public        *
*  License along with this library; if not, write to the Free Software      *
*  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
*                                                                           *
\*===========================================================================*/


//=== INCLUDES ================================================================

#include <Core/System/config.hh>
#include <Core/IO/reader/BaseReader.hh>
#include <algorithm>
#include <string>
#include <iterator>
#if defined(OM_CC_MIPS)
#  include <ctype.h>
#else
#  include <cctype>
#endif


//== NAMESPACES ===============================================================


namespace OpenMesh {
	namespace IO {


		//=== IMPLEMENTATION ==========================================================


		static inline char tolower(char c) 
		{
			using namespace std;
			return static_cast<char>(::tolower(c)); 
		}


		//-----------------------------------------------------------------------------


		bool 
			BaseReader::
			can_u_read(const std::string& _filename) const 
		{
			// get file extension
			std::string extension;
			std::string::size_type pos(_filename.rfind("."));

			if (pos != std::string::npos)
			{ 
				extension = _filename.substr(pos+1, _filename.length()-pos-1);

				std::transform( extension.begin(), extension.end(), 
					extension.begin(), tolower );
			}

			// locate extension in extension string
			return (get_extensions().find(extension) != std::string::npos);
		}


		//-----------------------------------------------------------------------------


		bool 
			BaseReader::
			check_extension(const std::string& _fname, const std::string& _ext) const
		{
			std::string cmpExt(_ext);

			std::transform( _ext.begin(), _ext.end(),  cmpExt.begin(), tolower );

			std::string::size_type pos(_fname.rfind("."));

			if (pos != std::string::npos && !_ext.empty() )
			{ 
				std::string ext;

				// extension without dot!
				ext = _fname.substr(pos+1, _fname.length()-pos-1);

				std::transform( ext.begin(), ext.end(), ext.begin(), tolower );

				return ext == cmpExt;
			}
			return false;  
		}


		//=============================================================================
	} // namespace IO
} // namespace OpenMesh
//=============================================================================
